St. Germain initially became involved with the show through her previous experience in G3 My Little Pony animated specials, having voiced Minty, Wysteria, and Thistle Whistle.[1] As part of her audition, St. Germain was told "not to do anything [she'd] done before", so she chose not to audition for Pinkie Pie, who is similar in character to Minty, or Fluttershy, who is similar to Wysteria.[2]

Among her fellow cast members, St. Germain is known to sometimes bring cookies and other sweets to recording sessions.[3][4]